Analog Devices / Maxim Integrated MAX20444C Automotive 4-Channel Backlight Drivers
Analog Devices MAX20444C Automotive 4-Channel Backlight Drivers feature integrated current outputs that can sink up to 130mA LED current each. The Analog Devices MAX20444C accepts a wide 4.5V to 36V input voltage range and withstands direct automotive load-dump events. The internal current-mode switching DC-DC controller supports boost or SEPIC topologies and operates in the frequency range 400kHz to 2.2MHz.
Features
- Wide-voltage-range operation
- Operates down to 4V supply after startup
- Survives load dump up to 52V
- High integration
- Complete 4-channel solution including boost controller
- I2C control for minimum parts count
- Robust and low EMI
- Spread-spectrum oscillator
- Phase-shifting
- 400kHz to 2.2MHz switching-frequency range
- Fail-safe operation mode using the FSEN pin
- Versatile dimming scheme allows hybrid or PWM-only dimming using DIM input or I2C
- Dimming ratio > 10000:1 using hybrid dimming
- 10000:1 dimming ratio at 200Hz using PWM dimming
- Complete diagnostics
- LED open/short detection and protection
- Boost output undervoltage and overvoltage
- Boost voltage
- Individual string LED current
- Thermal shutdown
- Compact (4mm x 4mm) 24-pin TQFN and SWTQFN packages
- Central information displays
- Infotainment displays
- Instrument clusters
Published: 2022-01-05
| Updated: 2023-04-17